<template>
  <div class="pana-tab__content">
    <a-form-model
        size="small"
        :label-col="{ span: 6 }"
        :wrapper-col="{ span: 18 }"
       >
      <a-form-model-item label="表单标识">
        <a-input v-model="formKey" allow-clear @change="updateElementFormKey" />
      </a-form-model-item>
      <a-form-model-item label="业务标识">
        <a-select style="width: 100%" v-model="businessKey" @change="updateElementBusinessKey">
          <a-select-option v-for="i in fieldList" :key="i.id" :value="i.id" >{{i.label}}</a-select-option>
          <a-select-option value="" >无</a-select-option>
        </a-select>
      </a-form-model-item>
    </a-form-model>

    <div v-if="prefix!='activiti'">

      <!--字段列表-->
      <div class="element-property list-property">
        <a-divider><a-icon type="form"></a-icon> 表单字段</a-divider>
        <a-table :pagination="false"  :data-source="fieldList" size="small" max-height="240"  >
          <a-table-column
              data-index="index"
              title="序号"
              width="50px"
              :custom-render="(text, record, index) => `${index + 1}`"
          />
          <a-table-column title="字段名称" data-index="label" min-width="80px"  />
          <a-table-column title="字段类型" data-index="type" min-width="80px" :custom-render="(text, record, index) => fieldType[record.type] || record.type" />
          <a-table-column title="默认值" data-index="defaultValue" min-width="80px" />
          <a-table-column title="操作" width="90px">
            <template slot-scope="text, record, index">
              <a @click="openFieldForm(record, index)">编辑</a>
              <a-divider type="vertical" />
              <a style="color: #ff4d4f" @click="removeField(record, index)">移除</a>
            </template>
          </a-table-column>
        </a-table>
      </div>
      <div class="element-drawer__button">
        <a-button size="small" block type="primary" icon="plus" @click="openFieldForm(null, -1)">添加字段</a-button>
      </div>

      <!--字段配置侧边栏-->
      <a-drawer :visible="fieldModelVisible" title="字段配置" @close="fieldModelVisible = false" :width="`${width}px`"  destroy-on-close>
        <a-form-model
            :model="formFieldForm"
            :label-col="{ span: 6 }"
            :wrapper-col="{ span: 18 }"
            size="small"
            @submit.native.prevent>
          <a-form-model-item label="字段ID">
            <a-input v-model="formFieldForm.id" allow-clear />
          </a-form-model-item>
          <a-form-model-item label="类型">
            <a-select style="width: 100%" v-model="formFieldForm.typeType" placeholder="请选择字段类型" allow-clear @change="changeFieldTypeType">
              <a-select-option v-for="(value, key) of fieldType"  :value="key" :key="key" >{{value}}</a-select-option>
            </a-select>
          </a-form-model-item>
          <a-form-model-item label="类型名称" v-if="formFieldForm.typeType === 'custom'">
            <a-input v-model="formFieldForm.type" allow-clear />
          </a-form-model-item>
          <a-form-model-item label="名称">
            <a-input v-model="formFieldForm.label" allow-clear />
          </a-form-model-item>
          <a-form-model-item label="时间格式" v-if="formFieldForm.typeType === 'date'">
            <a-input v-model="formFieldForm.datePattern" allow-clear />
          </a-form-model-item>
          <a-form-model-item label="默认值">
            <a-input v-model="formFieldForm.defaultValue" allow-clear />
          </a-form-model-item>
        </a-form-model>

        <!-- 枚举值设置 -->
        <template v-if="formFieldForm.type === 'enum'">
          <a-divider key="enum-divider" />
          <p class="listener-filed__title" key="enum-title">
            <span><i class="a-icon-menu"></i>枚举值列表：</span>
            <a-button size="small" type="primary" @click="openFieldOptionForm(null, -1, 'enum')">添加枚举值</a-button>
          </p>
          <a-table   :pagination="false"  :data-source="fieldEnumList" size="small" key="enum-table" max-height="240"  >
            <a-table-column
                data-index="index"
                title="序号"
                width="50px"
                :custom-render="(text, record, index) => `${index + 1}`"
            />
            <a-table-column title="枚举值编号" data-index="id" min-width="100px" />
            <a-table-column title="枚举值名称" data-index="name" min-width="100px" />
            <a-table-column title="操作" width="90px">
              <template slot-scope="text, record, index">
                <a @click="openFieldOptionForm(record, index, 'enum')">编辑</a>
                <a-divider type="vertical" />
                <a style="color: #ff4d4f" @click="removeFieldOptionItem(record, index, 'enum')">移除</a>
              </template>
            </a-table-column>
          </a-table>
        </template>

        <!-- 校验规则 -->
        <a-divider key="validation-divider" />
        <p class="listener-filed__title" key="validation-title">
          <span><i class="a-icon-menu"></i>约束条件列表：</span>
          <a-button size="small" type="primary" @click="openFieldOptionForm(null, -1, 'constraint')">添加约束</a-button>
        </p>
        <a-table   :pagination="false" :data-source="fieldConstraintsList" size="small" key="validation-table" max-height="240"  >
          <a-table-column
              data-index="index"
              title="序号"
              width="50px"
              :custom-render="(text, record, index) => `${index + 1}`"
          />
          <a-table-column title="约束名称" data-index="name" min-width="100px" />
          <a-table-column title="约束配置" data-index="config" min-width="100px" />
          <a-table-column title="操作" width="90px">
            <template slot-scope="text, record, index">
              <a @click="openFieldOptionForm(record, index, 'constraint')">编辑</a>
              <a-divider type="vertical" />
              <a style="color: #ff4d4f" @click="removeFieldOptionItem(record, index, 'constraint')">移除</a>
            </template>
          </a-table-column>
        </a-table>

        <!-- 表单属性 -->
        <a-divider key="property-divider" />
        <p class="listener-filed__title" key="property-title">
          <span><i class="a-icon-menu"></i>字段属性列表：</span>
          <a-button size="small" type="primary" @click="openFieldOptionForm(null, -1, 'property')">添加属性</a-button>
        </p>
        <a-table   :pagination="false" :data-source="fieldPropertiesList" size="small" key="property-table" max-height="240"  >
          <a-table-column
              data-index="index"
              title="序号"
              width="50px"
              :custom-render="(text, record, index) => `${index + 1}`"
          />
          <a-table-column title="属性编号" data-index="id" min-width="100px" />
          <a-table-column title="属性值" data-index="value" min-width="100px" />
          <a-table-column title="操作" width="90px">
            <template slot-scope="text, record , index ">
              <a  @click="openFieldOptionForm(record, index, 'property')">编辑</a>
              <a-divider type="vertical" />
              <a style="color: #ff4d4f" @click="removeFieldOptionItem(record, index, 'property')">移除</a>
            </template>
          </a-table-column>
        </a-table>

        <!-- 底部按钮 -->
        <div class="element-drawer__button">
          <a-button size="small">取 消</a-button>
          <a-button size="small" type="primary" @click="saveField">保 存</a-button>
        </div>
      </a-drawer>

      <a-modal :visible="fieldOptionModelVisible" :title="optionModelTitle" width="600px" destroy-on-close>
        <a-form-model
            :model="fieldOptionForm"
            size="small"
            :label-col="{ span: 6 }"
            :wrapper-col="{ span: 18 }"
        >
          <a-form-model-item label="编号/ID" v-if="fieldOptionType !== 'constraint'" key="option-id">
            <a-input v-model="fieldOptionForm.id" allow-clear />
          </a-form-model-item>
          <a-form-model-item label="名称" v-if="fieldOptionType !== 'property'" key="option-name">
            <a-input v-model="fieldOptionForm.name" allow-clear />
          </a-form-model-item>
          <a-form-model-item label="配置" v-if="fieldOptionType === 'constraint'" key="option-config">
            <a-input v-model="fieldOptionForm.config" allow-clear />
          </a-form-model-item>
          <a-form-model-item label="值" v-if="fieldOptionType === 'property'" key="option-value">
            <a-input v-model="fieldOptionForm.value" allow-clear />
          </a-form-model-item>
        </a-form-model>
        <template slot="footer">
          <a-button size="small" @click="fieldOptionModelVisible = false">取 消</a-button>
          <a-button size="small" type="primary" @click="saveFieldOption">确 定</a-button>
        </template>
      </a-modal>
    </div>
  </div>
</template>

<script>
export default {
  name: 'ElementForm',
  props: {
    id: String,
    type: String
  },
  inject: {
    prefix: 'prefix',
    width: 'width'
  },
  data() {
    return {
      formKey: '',
      businessKey: '',
      optionModelTitle: '',
      fieldList: [],
      formFieldForm: {},
      fieldType: {
        string: '字符串',
        long: '长整型',
        boolean: '布尔类',
        date: '日期类',
        enum: '枚举类',
        custom: '自定义类型'
      },
      formFieldIndex: -1, // 编辑中的字段， -1 为新增
      formFieldOptionIndex: -1, // 编辑中的字段配置项， -1 为新增
      fieldModelVisible: false,
      fieldOptionModelVisible: false,
      fieldOptionForm: {}, // 当前激活的字段配置项数据
      fieldOptionType: '', // 当前激活的字段配置项弹窗 类型
      fieldEnumList: [], // 枚举值列表
      fieldConstraintsList: [], // 约束条件列表
      fieldPropertiesList: [] // 绑定属性列表
    }
  },
  watch: {
    id: {
      immediate: true,
      handler(val) {
        val && val.length && this.$nextTick(() => this.resetFormList())
      }
    }
  },
  methods: {
    resetFormList() {
      this.bpmnELement = window.bpmnInstances.bpmnElement
      this.formKey = this.bpmnELement.businessObject.formKey
      // 获取元素扩展属性 或者 创建扩展属性
      this.elExtensionElements =
          this.bpmnELement.businessObject.get('extensionElements') || window.bpmnInstances.moddle.create('bpmn:ExtensionElements', { values: [] })
      // 获取元素表单配置 或者 创建新的表单配置
      this.formData =
          this.elExtensionElements.values.filter(ex => ex.$type === `${this.prefix}:FormData`)?.[0] ||
          window.bpmnInstances.moddle.create(`${this.prefix}:FormData`, { fields: [] })

      // 业务标识 businessKey， 绑定在 formData 中
      this.businessKey = this.formData.businessKey

      // 保留剩余扩展元素，便于后面更新该元素对应属性
      this.otherExtensions = this.elExtensionElements.values.filter(ex => ex.$type !== `${this.prefix}:FormData`)

      // 复制原始值，填充表格
      this.fieldList = JSON.parse(JSON.stringify(this.formData.fields || []))

      // 更新元素扩展属性，避免后续报错
      this.updateElementExtensions()
    },
    updateElementFormKey() {
      window.bpmnInstances.modeling.updateProperties(this.bpmnELement, { formKey: this.formKey })
    },
    updateElementBusinessKey() {
      window.bpmnInstances.modeling.updateModdleProperties(this.bpmnELement, this.formData, {
        businessKey: this.businessKey
      })
    },
    // 根据类型调整字段type
    changeFieldTypeType(type) {
      this.$set(this.formFieldForm, 'type', type === 'custom' ? '' : type)
    },

    // 打开字段详情侧边栏
    openFieldForm(field, index) {
      this.formFieldIndex = index
      if (index !== -1) {
        const FieldObject = this.formData.fields[index]
        this.formFieldForm = JSON.parse(JSON.stringify(field))
        // 设置自定义类型
        this.$set(this.formFieldForm, 'typeType', !this.fieldType[field.type] ? 'custom' : field.type)
        // 初始化枚举值列表
        field.type === 'enum' && (this.fieldEnumList = JSON.parse(JSON.stringify(FieldObject?.values || [])))
        // 初始化约束条件列表
        this.fieldConstraintsList = JSON.parse(JSON.stringify(FieldObject?.validation?.constraints || []))
        // 初始化自定义属性列表
        this.fieldPropertiesList = JSON.parse(JSON.stringify(FieldObject?.properties?.values || []))
      } else {
        this.formFieldForm = {}
        // 初始化枚举值列表
        this.fieldEnumList = []
        // 初始化约束条件列表
        this.fieldConstraintsList = []
        // 初始化自定义属性列表
        this.fieldPropertiesList = []
      }
      this.fieldModelVisible = true
    },
    // 打开字段 某个 配置项 弹窗
    openFieldOptionForm(option, index, type) {
      this.fieldOptionModelVisible = true
      this.fieldOptionType = type
      this.formFieldOptionIndex = index
      if (type === 'property') {
        this.fieldOptionForm = option ? JSON.parse(JSON.stringify(option)) : {}
        return (this.optionModelTitle = '属性配置')
      }
      if (type === 'enum') {
        this.fieldOptionForm = option ? JSON.parse(JSON.stringify(option)) : {}
        return (this.optionModelTitle = '枚举值配置')
      }
      this.fieldOptionForm = option ? JSON.parse(JSON.stringify(option)) : {}
      return (this.optionModelTitle = '约束条件配置')
    },

    // 保存字段 某个 配置项
    saveFieldOption() {
      if (this.formFieldOptionIndex === -1) {
        if (this.fieldOptionType === 'property') {
          this.fieldPropertiesList.push(this.fieldOptionForm)
        }
        if (this.fieldOptionType === 'constraint') {
          this.fieldConstraintsList.push(this.fieldOptionForm)
        }
        if (this.fieldOptionType === 'enum') {
          this.fieldEnumList.push(this.fieldOptionForm)
        }
      } else {
        this.fieldOptionType === 'property' && this.fieldPropertiesList.splice(this.formFieldOptionIndex, 1, this.fieldOptionForm)
        this.fieldOptionType === 'constraint' && this.fieldConstraintsList.splice(this.formFieldOptionIndex, 1, this.fieldOptionForm)
        this.fieldOptionType === 'enum' && this.fieldEnumList.splice(this.formFieldOptionIndex, 1, this.fieldOptionForm)
      }
      this.fieldOptionModelVisible = false
      this.fieldOptionForm = {}
    },
    // 保存字段配置
    saveField() {
      const { id, type, label, defaultValue, datePattern } = this.formFieldForm
      const Field = window.bpmnInstances.moddle.create(`${this.prefix}:FormField`, { id, type, label })
      defaultValue && (Field.defaultValue = defaultValue)
      datePattern && (Field.datePattern = datePattern)
      // 构建属性
      if (this.fieldPropertiesList && this.fieldPropertiesList.length) {
        const fieldPropertyList = this.fieldPropertiesList.map(fp => {
          return window.bpmnInstances.moddle.create(`${this.prefix}:Property`, { id: fp.id, value: fp.value })
        })
        Field.properties = window.bpmnInstances.moddle.create(`${this.prefix}:Properties`, {
          values: fieldPropertyList
        })
      }
      // 构建校验规则
      if (this.fieldConstraintsList && this.fieldConstraintsList.length) {
        const fieldConstraintList = this.fieldConstraintsList.map(fc => {
          return window.bpmnInstances.moddle.create(`${this.prefix}:Constraint`, { name: fc.name, config: fc.config })
        })
        Field.validation = window.bpmnInstances.moddle.create(`${this.prefix}:Validation`, {
          constraints: fieldConstraintList
        })
      }
      // 构建枚举值
      if (this.fieldEnumList && this.fieldEnumList.length) {
        Field.values = this.fieldEnumList.map(fe => {
          return window.bpmnInstances.moddle.create(`${this.prefix}:Value`, { name: fe.name, id: fe.id })
        })
      }
      // 更新数组 与 表单配置实例
      if (this.formFieldIndex === -1) {
        this.fieldList.push(this.formFieldForm)
        this.formData.fields.push(Field)
      } else {
        this.fieldList.splice(this.formFieldIndex, 1, this.formFieldForm)
        this.formData.fields.splice(this.formFieldIndex, 1, Field)
      }
      this.updateElementExtensions()
      this.fieldModelVisible = false
    },

    // 移除某个 字段的 配置项
    removeFieldOptionItem(option, index, type) {
      if (type === 'property') {
        this.fieldPropertiesList.splice(index, 1)
        return
      }
      if (type === 'enum') {
        this.fieldEnumList.splice(index, 1)
        return
      }
      this.fieldConstraintsList.splice(index, 1)
    },
    // 移除 字段
    removeField(field, index) {
      this.fieldList.splice(index, 1)
      this.formData.fields.splice(index, 1)
      this.updateElementExtensions()
    },

    updateElementExtensions() {
      // 更新回扩展元素
      const newElExtensionElements = window.bpmnInstances.moddle.create(`bpmn:ExtensionElements`, {
        values: this.otherExtensions.concat(this.formData)
      })
      // 更新到元素上
      window.bpmnInstances.modeling.updateProperties(this.bpmnELement, {
        extensionElements: newElExtensionElements
      })
    }
  }
}
</script>
